This saying is attributed to Muhammad Al Baqir (rahimahullah), that on the day of Badr an angel called out “There is no better man than ‘Ali, and no sword better than Zul-Faqar”

However, ‘Allama Sakhawi (rahimahullah) has said that this narration is very weak. Mulla ‘Ali Al Qari (rahimahullah) also mentions that this Hadith has no basis and portrays it as this is an innovation of the Shi’ah. Sa’d ibn Tarif is a narrator of this narration, Hafiz Ibn Hajar (rahimahullah) says he is very weak and that he was a Raafidi (an extremist Shi’i). This Hadith is supporting his corrupt beliefs thus rendering his narration as unacceptable. (See: Al Maqasidul Hasanah: 1307, Al Asrarul Marfu’ah, 595 and Taqribut Tahdhib)

 Allâmah Sakhâwiy said this narration is “very weak” (Al-Maqaasidul Hasana, 1307).Imâm al-Bukhâri said: “Munkar al-Hadith.”Ibn Ma’een said his narrations are nothing.Abû Hâtim said: “Extremely rejected.” (Mizan, #7904).Imam al-Suyûtî rejected this narration in “La’ali al-masnu’a” (1/333).Al-Dhahabî rejected it in “Talkhees Kitab al-Maudua” (1/126/#274).

Hâfiz Ibn Taymiyyah said:“This narration is from false, fabricated stories–in accordance to the ijma (consensus) of people who know the science of Hadith.” (Mukhtasar Minhaj as-Sunnah).Al-Shawkânî said in “Fawaid al-Majmua” (372/#68): “And in the chain is Eesa ibn Mihran, and he is Rafidhi (Shia extremist), who narrated false stories. Ibn al-Jawzi included this narration in his book on fabricated Hadith.”

Ibn Katheer said : “hadith munkar” (al bidayah, 7/293). Additionally,  Mulla ‘Ali Al Qâri  also mentions that this hadith has “no basis” and portrays it as this is an innovation of the Shi’a. (Al-Asraarul marfoo’a, 595). Sa’d bin Tareef is a raawi of this narration and Ibn hajar says he is matrook (rejected) and that he was a raafidi, This hadith is supporting his tashayyu’ thus rendering his narration as unacceptable (Taqreebut Tahzeeb)

Hafiz Ibn Kathir (rahimahullah) has cited a lengthier version of this Hadith which attributes these words to Nabi (sallallahu ‘alayhi wa sallam). However he has declared the text unreliable (munkar). (Al Bidayah Wan Nihayah, vol. 7 pg. 451)

 Note: Dhul Faqar being the name of the sword of Nabi (sallalahu ‘alayhi wa sallam) is proven in other narrations.

 And Allah Ta’ala Knows Best

https://hadithanswers.com/hadith-there-is-no-sword-better-than-zul-faqar-and-no-man-better-than-ali/
https://mawdu.wordpress.com/2013/04/30/sword-zulfiqar-zulfikar-dhulfiqar-ali-battle-badr/
https://www.askimam.org/public/question_detail/25289
https://muftionline.co.za/node/2519